Combined pump jack and head



OGL 4, 1932- A. M. BROWN COMBINED PUMP JACK AND HEAD sheets-sheet 1Filed May 22, 195C Slwcntor A. M. iow/z ffl..

Ot. 4, 1932. A. M. BROWN COMBINED `PUMP JACK AND HEAD Filed May 22. 193C2. Sheets-Sheet l2 3 nvcntor (ttorncgm Patented Oct. 4, 1932 ALDRICH M.BROWN, OF lvOBILE, .lrLAlB.AMAV

,Application ineaA my ,22,

" such, and which may be quickly and accuately attached to the upper endof the Well casing without the services of a skilled mechanic or the aidof special tools. 4

Another object of the invention consists in the provision of such adevicey which while strong and durable is nevertheless of light. andinexpensive construction and so designed as to avoid damage to the wellcasing on which it is directly mounted.

A further object of the invention residesy in the provision of a pumpack composed of welded tubing, which not only permits of lightness Vinconstruction, but also provides simplicity and compactness inconstruction inasmuch as the tubing serves both as a support or frameand also as' an air-cushion or pressure regulator for the liquid drawnfro the well. j

@ther objects and advantages ofthe invention will lbe apparent from thefollowing description when taken in connection' with the accompanyingdrawings, in which Figure 1 is a front elevational view of the combinedpump jack and' head,'pa1ts being shown in section. Y

Figure 2 is a fragmentary side view of the jack standard, crank disc7and connecting` rod.

Figure 8 is a side view of the apparatus taken at an angle of 90 degreesfrom Figure 1.

Figure if is a detail perspective view of the pump head, motorsupporting brackets, etc.; and

Figure 5 is a fragmentary sectional view taken on line 5 5 of Figure 1.

Referring to the drawings in more detail, the numeral 1 indicates aconventional casing such as is used in oil wells, and the like, and thenumeral'Z indicates a pump cylinder located in the casing at the desireddistance below the surface. The present pump jack is designed to .beattached directly to 4the upper end of the ca-sing l, and to this endthe tubular member 3 is provided with threads 4 by means of which it maybe attached to the cas- 1930. l Serial -No. 454,801.

ing through the `medium of the coupling 5. ltis to be understood,however, that any type of Vcorniectionmay be .employed for securing thetubular member 3 lto the Well casing.

Welded to the upper end of the tubular member 3 is a cylindrical bearingmember 6 of substantially less diameter than thev tubular member 3.'vWithin this bearing mem-A ber 6 is reciprocably mounted a plunger 7, anda packing gland'` is provided on the up@ per Yend of lthe bearing memberto prevent leakage. The lower end of the plunger 7 is provided with asocket 9 adapted to receive the upper end of the conventional sucker rod10 and set screwsll are provided for securing the sucker rod within thesocket.. Y Welded on one side of the tubular member Band in.communication therewith is a tubular supportingbracketl2 which serves asa support for a tubular standard '13 which is in communication with theinterior of the bracketi12 and is electrically welded thereto. Thestandard 13 serves as a. support for the driving mechanism of the wellpump and to this end a tubular bearing member 14 is welded onto theupper end of the standard 13 and has mounted therein a drive shaft 15.IThis drive shafthas fixedly secured to one vend thereof a driving wheel16 andA on the other end a crank disc 17.l

The driving` wheel 16 is of fairly light con-- structionand is driven bymeans of a. belt 18 which is in turn driven by the rotor shaft of anelectric motor 19. Motor 19 is preferably mounted on angle irons 2Owelded to the tus bular bracket 12 and it is to be noted that the pulleywheel on its drive shaft 21 is rela-1 tively small so as to reduce thespeed of rotation of drive shaft of the pump mechanism.

ln order to maintain the belt 18 at the proper tension a belt tighteneris rovided andl comprises an arm 22 pivoted tot e standfard 13 asindicated by the numeral 273 and providedwith an idler pulley 24which'isl causedl to bear against the belt 18 by means of its spring 25.v I A Asv will appear hereinafter the hollow standard lmust be air andlliquid tight and in order to maintain this condition and at 130 the sametime provide for pivoting the arm 22, a sleeve 26 passes through thistubular member and is welded at its opposite ends to the walls ofthestandard. This sleeve serves as a bearing for the pivot shaft 27 of thebelt plunger 7 and it will bevnoted that the crank disc 17 is providedwith a plurality of apertures 29 arranged at varying radial distances ifrom the center of the crank disc, so as to permit of mounting theconnecting rod 28 to vary the throw of the crank disc and consequentlythe length of stroke of the sucker rod.

As will appearas the description proceeds the hollow standard 13 servesnot only as a support for the driving mechanism, but also as a pressureregulator for the fluid pumped from the well. However, itis frequentlydesirable to improve a water system `by Vadding' a combined supply tankand pressure regulator, and such a device is indicated in Figure 1 asapplied to the present construction. This combined storage tank andpressureregulator is indicated by the numeral 3() and is mounted on thepipe line 31 which is in communication with the tubular member `3 of thecombined pump jack and head. The iirst section of the pipe line 31 isthreaded into a coupling 32 which is welded to the outside of thetubular member 3 and is in communie cation with the interior thereof.Any form of connection may, of course, be provided for the supply tankand pressure regulator 3VO.`

In the present instance, however, this connection is shown as aT-coupling 33 disposed in the line 31 at a point adjacent the tubularmember 3. The tank 30 is provided with a pressure operated switch 34 ofusual construction and adapted to open the vcircuit through the motor 19when the pressure within the tank reaches that for which the pres sureswitch is set. l

As already indicated the several elements of the head andy `frame areformed of tubular elements in communication with each other and `havingthe joints welded. By this design a very light and inexpensiveconstruction is provided which is adaptable to be mounted on the upperend of the well casing without liability of damage thereto by vibrationor undue stresses and strains. In this connection it is to be noted thatthe standard 13 is supported on the tubular bracket 12 at a point veryclose to the axis of the tubular member 3 and the well casing, thusavoiding any undue strain on the casing and related parts by the forceapplied to the connecting rod 28 when the apparatus is in operation.

It is to be noted also that the hollow stand- Y ard 13 is incommunication with the tubular casing 1. Accordingly this member 13serves not only as a support for the operating mechanisms of the jack,but also as a pressure regulator inasmuch as the liquid raised from thewell will rise in the tube 13 to compress the'air in the upper endthereof, and thus provide for a steady ilow ofl fluid tromV the well. o

In assembling the device, which may be purchased as a unit, the plunger7 is disconnected from the connecting rod 28, removed from its bearing6, and securedV by means of socket 9. and set screws 11 to the upper endof the sucker rod 10. The bearing member i' 6V and its associated partsare then brought into position by threading the bearing member'over theupper end ot' the plunger 7 and securing the connecting rodthereto. Thelower end of the tubular member 3 is then secured to the upper end ofthe well casing f as by means ot the coupling member 5. It will thusappear thatV the entire device may be assembled in operative positionwithout the use of special tools `and without the aid of a skilledmechanic.

From the foregoing description taken in connection with the accompanyingdrawings it will be apparent that I have devised an eX- ceedinglysimple, light, and well balanced construction of pump jack and head; and

that the standard 13 serves both as a support for the driving mechanismand also as a pres` sure regulator, thus providing both a compact andinexpensive type of construction.

In accordance with the patent statutes I have described what I nowbelieve to be the best embodiment of my invention, but I do not wish tobe understod thereby as limiting myself or the scope of the inventionmany changes and modifications may be made member extending transverselythrough said tubular standard and welded therein, and a belt tightenerpivotally mounted in said bearing. Y r

, Y ALDRICI-I M. BROWN.

